Annotation of src/usr.bin/ssh/readconf.c, Revision 1.137
1.1 deraadt 1: /*
1.18 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Functions for reading the configuration files.
1.26 markus 6: *
1.46 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 12: */
1.1 deraadt 13:
14: #include "includes.h"
1.137 ! djm 15: RCSID("$OpenBSD: readconf.c,v 1.136 2005/03/01 10:40:26 djm Exp $");
1.1 deraadt 16:
17: #include "ssh.h"
18: #include "xmalloc.h"
1.25 markus 19: #include "compat.h"
1.58 markus 20: #include "cipher.h"
1.55 markus 21: #include "pathnames.h"
1.58 markus 22: #include "log.h"
23: #include "readconf.h"
24: #include "match.h"
25: #include "misc.h"
1.62 markus 26: #include "kex.h"
27: #include "mac.h"
1.1 deraadt 28:
29: /* Format of the configuration file:
30:
31: # Configuration data is parsed as follows:
32: # 1. command line options
33: # 2. user-specific file
34: # 3. system-wide file
35: # Any configuration value is only changed the first time it is set.
36: # Thus, host-specific definitions should be at the beginning of the
37: # configuration file, and defaults at the end.
38:
39: # Host-specific declarations. These may override anything above. A single
40: # host may match multiple declarations; these are processed in the order
41: # that they are given in.
42:
43: Host *.ngs.fi ngs.fi
1.96 markus 44: User foo
1.1 deraadt 45:
46: Host fake.com
47: HostName another.host.name.real.org
48: User blaah
49: Port 34289
50: ForwardX11 no
51: ForwardAgent no
52:
53: Host books.com
54: RemoteForward 9999 shadows.cs.hut.fi:9999
55: Cipher 3des
56:
57: Host fascist.blob.com
58: Port 23123
59: User tylonen
60: PasswordAuthentication no
61:
62: Host puukko.hut.fi
63: User t35124p
64: ProxyCommand ssh-proxy %h %p
65:
66: Host *.fr
1.96 markus 67: PublicKeyAuthentication no
1.1 deraadt 68:
69: Host *.su
70: Cipher none
71: PasswordAuthentication no
72:
73: # Defaults for various options
74: Host *
75: ForwardAgent no
1.50 markus 76: ForwardX11 no
1.1 deraadt 77: PasswordAuthentication yes
78: RSAAuthentication yes
79: RhostsRSAAuthentication yes
80: StrictHostKeyChecking yes
1.126 markus 81: TcpKeepAlive no
1.1 deraadt 82: IdentityFile ~/.ssh/identity
83: Port 22
84: EscapeChar ~
85:
86: */
87:
88: /* Keyword tokens. */
89:
1.17 markus 90: typedef enum {
91: oBadOption,
1.123 markus 92: oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
1.100 deraadt 93: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 94: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 95: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
96: oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
97: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
98: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 99: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 100: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 101: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 102: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 103: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.90 stevesk 104: oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
1.96 markus 105: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 106: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 107: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 108: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.136 djm 109: oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
1.110 jakob 110: oDeprecated, oUnsupported
1.1 deraadt 111: } OpCodes;
112:
113: /* Textual representations of the tokens. */
114:
1.17 markus 115: static struct {
116: const char *name;
117: OpCodes opcode;
118: } keywords[] = {
119: { "forwardagent", oForwardAgent },
120: { "forwardx11", oForwardX11 },
1.123 markus 121: { "forwardx11trusted", oForwardX11Trusted },
1.34 markus 122: { "xauthlocation", oXAuthLocation },
1.17 markus 123: { "gatewayports", oGatewayPorts },
124: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 125: { "rhostsauthentication", oDeprecated },
1.17 markus 126: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 127: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
128: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 129: { "rsaauthentication", oRSAAuthentication },
1.50 markus 130: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 131: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 132: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 133: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 134: { "challengeresponseauthentication", oChallengeResponseAuthentication },
135: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
136: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 137: { "kerberosauthentication", oUnsupported },
138: { "kerberostgtpassing", oUnsupported },
139: { "afstokenpassing", oUnsupported },
1.118 markus 140: #if defined(GSSAPI)
141: { "gssapiauthentication", oGssAuthentication },
142: { "gssapidelegatecredentials", oGssDelegateCreds },
143: #else
144: { "gssapiauthentication", oUnsupported },
145: { "gssapidelegatecredentials", oUnsupported },
146: #endif
1.96 markus 147: { "fallbacktorsh", oDeprecated },
148: { "usersh", oDeprecated },
1.17 markus 149: { "identityfile", oIdentityFile },
1.50 markus 150: { "identityfile2", oIdentityFile }, /* alias */
1.128 markus 151: { "identitiesonly", oIdentitiesOnly },
1.17 markus 152: { "hostname", oHostName },
1.52 markus 153: { "hostkeyalias", oHostKeyAlias },
1.17 markus 154: { "proxycommand", oProxyCommand },
155: { "port", oPort },
156: { "cipher", oCipher },
1.25 markus 157: { "ciphers", oCiphers },
1.62 markus 158: { "macs", oMacs },
1.25 markus 159: { "protocol", oProtocol },
1.17 markus 160: { "remoteforward", oRemoteForward },
161: { "localforward", oLocalForward },
162: { "user", oUser },
163: { "host", oHost },
164: { "escapechar", oEscapeChar },
165: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.81 markus 166: { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
1.27 markus 167: { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
1.81 markus 168: { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
1.17 markus 169: { "connectionattempts", oConnectionAttempts },
170: { "batchmode", oBatchMode },
171: { "checkhostip", oCheckHostIP },
172: { "stricthostkeychecking", oStrictHostKeyChecking },
173: { "compression", oCompression },
174: { "compressionlevel", oCompressionLevel },
1.126 markus 175: { "tcpkeepalive", oTCPKeepAlive },
176: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 177: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
178: { "loglevel", oLogLevel },
1.71 markus 179: { "dynamicforward", oDynamicForward },
1.67 markus 180: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 181: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 182: { "bindaddress", oBindAddress },
1.110 jakob 183: #ifdef SMARTCARD
1.85 jakob 184: { "smartcarddevice", oSmartcardDevice },
1.110 jakob 185: #else
186: { "smartcarddevice", oUnsupported },
187: #endif
1.93 deraadt 188: { "clearallforwardings", oClearAllForwardings },
1.101 markus 189: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 190: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 191: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 192: { "rekeylimit", oRekeyLimit },
1.111 djm 193: { "connecttimeout", oConnectTimeout },
1.112 djm 194: { "addressfamily", oAddressFamily },
1.127 markus 195: { "serveraliveinterval", oServerAliveInterval },
196: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 197: { "sendenv", oSendEnv },
1.132 djm 198: { "controlpath", oControlPath },
199: { "controlmaster", oControlMaster },
1.136 djm 200: { "hashknownhosts", oHashKnownHosts },
1.92 stevesk 201: { NULL, oBadOption }
1.13 markus 202: };
203:
1.19 markus 204: /*
205: * Adds a local TCP/IP port forward to options. Never returns if there is an
206: * error.
207: */
1.1 deraadt 208:
1.26 markus 209: void
1.135 djm 210: add_local_forward(Options *options, const Forward *newfwd)
1.1 deraadt 211: {
1.17 markus 212: Forward *fwd;
213: extern uid_t original_real_uid;
1.135 djm 214: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
1.64 millert 215: fatal("Privileged ports can only be forwarded by root.");
1.17 markus 216: if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
217: fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
218: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 219:
220: fwd->listen_host = (newfwd->listen_host == NULL) ?
221: NULL : xstrdup(newfwd->listen_host);
222: fwd->listen_port = newfwd->listen_port;
223: fwd->connect_host = xstrdup(newfwd->connect_host);
224: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 225: }
226:
1.19 markus 227: /*
228: * Adds a remote TCP/IP port forward to options. Never returns if there is
229: * an error.
230: */
1.1 deraadt 231:
1.26 markus 232: void
1.135 djm 233: add_remote_forward(Options *options, const Forward *newfwd)
1.1 deraadt 234: {
1.17 markus 235: Forward *fwd;
236: if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
237: fatal("Too many remote forwards (max %d).",
1.93 deraadt 238: SSH_MAX_FORWARDS_PER_DIRECTION);
1.17 markus 239: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 240:
241: fwd->listen_host = (newfwd->listen_host == NULL) ?
242: NULL : xstrdup(newfwd->listen_host);
243: fwd->listen_port = newfwd->listen_port;
244: fwd->connect_host = xstrdup(newfwd->connect_host);
245: fwd->connect_port = newfwd->connect_port;
1.1 deraadt 246: }
247:
1.90 stevesk 248: static void
249: clear_forwardings(Options *options)
250: {
251: int i;
252:
1.135 djm 253: for (i = 0; i < options->num_local_forwards; i++) {
254: xfree(options->local_forwards[i].listen_host);
255: xfree(options->local_forwards[i].connect_host);
256: }
1.90 stevesk 257: options->num_local_forwards = 0;
1.135 djm 258: for (i = 0; i < options->num_remote_forwards; i++) {
259: xfree(options->remote_forwards[i].listen_host);
260: xfree(options->remote_forwards[i].connect_host);
261: }
1.90 stevesk 262: options->num_remote_forwards = 0;
263: }
264:
1.19 markus 265: /*
1.70 stevesk 266: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 267: */
1.1 deraadt 268:
1.26 markus 269: static OpCodes
1.17 markus 270: parse_token(const char *cp, const char *filename, int linenum)
1.1 deraadt 271: {
1.51 markus 272: u_int i;
1.1 deraadt 273:
1.17 markus 274: for (i = 0; keywords[i].name; i++)
1.20 markus 275: if (strcasecmp(cp, keywords[i].name) == 0)
1.17 markus 276: return keywords[i].opcode;
277:
1.75 stevesk 278: error("%s: line %d: Bad configuration option: %s",
279: filename, linenum, cp);
1.17 markus 280: return oBadOption;
1.1 deraadt 281: }
282:
1.19 markus 283: /*
284: * Processes a single option line as used in the configuration files. This
285: * only sets those values that have not already been set.
286: */
1.102 markus 287: #define WHITESPACE " \t\r\n"
1.1 deraadt 288:
1.14 markus 289: int
290: process_config_line(Options *options, const char *host,
1.17 markus 291: char *line, const char *filename, int linenum,
292: int *activep)
1.1 deraadt 293: {
1.135 djm 294: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
1.22 markus 295: int opcode, *intptr, value;
1.102 markus 296: size_t len;
1.135 djm 297: Forward fwd;
1.106 djm 298:
299: /* Strip trailing whitespace */
300: for(len = strlen(line) - 1; len > 0; len--) {
301: if (strchr(WHITESPACE, line[len]) == NULL)
302: break;
303: line[len] = '\0';
304: }
1.1 deraadt 305:
1.42 provos 306: s = line;
307: /* Get the keyword. (Each line is supposed to begin with a keyword). */
308: keyword = strdelim(&s);
309: /* Ignore leading whitespace. */
310: if (*keyword == '\0')
1.43 markus 311: keyword = strdelim(&s);
1.56 deraadt 312: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 313: return 0;
314:
1.38 provos 315: opcode = parse_token(keyword, filename, linenum);
1.17 markus 316:
317: switch (opcode) {
318: case oBadOption:
1.19 markus 319: /* don't panic, but count bad options */
320: return -1;
1.17 markus 321: /* NOTREACHED */
1.111 djm 322: case oConnectTimeout:
323: intptr = &options->connection_timeout;
1.127 markus 324: parse_time:
1.111 djm 325: arg = strdelim(&s);
326: if (!arg || *arg == '\0')
327: fatal("%s line %d: missing time value.",
328: filename, linenum);
329: if ((value = convtime(arg)) == -1)
330: fatal("%s line %d: invalid time value.",
331: filename, linenum);
332: if (*intptr == -1)
333: *intptr = value;
334: break;
335:
1.17 markus 336: case oForwardAgent:
337: intptr = &options->forward_agent;
338: parse_flag:
1.42 provos 339: arg = strdelim(&s);
1.40 ho 340: if (!arg || *arg == '\0')
1.17 markus 341: fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
342: value = 0; /* To avoid compiler warning... */
1.38 provos 343: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 344: value = 1;
1.38 provos 345: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 346: value = 0;
347: else
348: fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
349: if (*activep && *intptr == -1)
350: *intptr = value;
351: break;
352:
353: case oForwardX11:
354: intptr = &options->forward_x11;
355: goto parse_flag;
356:
1.123 markus 357: case oForwardX11Trusted:
358: intptr = &options->forward_x11_trusted;
359: goto parse_flag;
360:
1.17 markus 361: case oGatewayPorts:
362: intptr = &options->gateway_ports;
363: goto parse_flag;
364:
365: case oUsePrivilegedPort:
366: intptr = &options->use_privileged_port;
367: goto parse_flag;
368:
369: case oPasswordAuthentication:
370: intptr = &options->password_authentication;
371: goto parse_flag;
372:
1.48 markus 373: case oKbdInteractiveAuthentication:
374: intptr = &options->kbd_interactive_authentication;
375: goto parse_flag;
376:
377: case oKbdInteractiveDevices:
378: charptr = &options->kbd_interactive_devices;
379: goto parse_string;
380:
1.50 markus 381: case oPubkeyAuthentication:
382: intptr = &options->pubkey_authentication;
1.30 markus 383: goto parse_flag;
384:
1.17 markus 385: case oRSAAuthentication:
386: intptr = &options->rsa_authentication;
387: goto parse_flag;
388:
389: case oRhostsRSAAuthentication:
390: intptr = &options->rhosts_rsa_authentication;
391: goto parse_flag;
392:
1.72 markus 393: case oHostbasedAuthentication:
394: intptr = &options->hostbased_authentication;
395: goto parse_flag;
396:
1.59 markus 397: case oChallengeResponseAuthentication:
1.78 markus 398: intptr = &options->challenge_response_authentication;
1.17 markus 399: goto parse_flag;
1.108 jakob 400:
1.118 markus 401: case oGssAuthentication:
402: intptr = &options->gss_authentication;
403: goto parse_flag;
404:
405: case oGssDelegateCreds:
406: intptr = &options->gss_deleg_creds;
407: goto parse_flag;
408:
1.17 markus 409: case oBatchMode:
410: intptr = &options->batch_mode;
411: goto parse_flag;
412:
413: case oCheckHostIP:
414: intptr = &options->check_host_ip;
415: goto parse_flag;
416:
1.107 jakob 417: case oVerifyHostKeyDNS:
418: intptr = &options->verify_host_key_dns;
1.125 jakob 419: goto parse_yesnoask;
1.107 jakob 420:
1.17 markus 421: case oStrictHostKeyChecking:
422: intptr = &options->strict_host_key_checking;
1.125 jakob 423: parse_yesnoask:
1.42 provos 424: arg = strdelim(&s);
1.40 ho 425: if (!arg || *arg == '\0')
1.60 stevesk 426: fatal("%.200s line %d: Missing yes/no/ask argument.",
1.93 deraadt 427: filename, linenum);
1.17 markus 428: value = 0; /* To avoid compiler warning... */
1.38 provos 429: if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1.17 markus 430: value = 1;
1.38 provos 431: else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1.17 markus 432: value = 0;
1.38 provos 433: else if (strcmp(arg, "ask") == 0)
1.17 markus 434: value = 2;
435: else
436: fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
437: if (*activep && *intptr == -1)
438: *intptr = value;
439: break;
440:
441: case oCompression:
442: intptr = &options->compression;
443: goto parse_flag;
444:
1.126 markus 445: case oTCPKeepAlive:
446: intptr = &options->tcp_keep_alive;
1.17 markus 447: goto parse_flag;
448:
1.91 markus 449: case oNoHostAuthenticationForLocalhost:
450: intptr = &options->no_host_authentication_for_localhost;
451: goto parse_flag;
452:
1.17 markus 453: case oNumberOfPasswordPrompts:
454: intptr = &options->number_of_password_prompts;
455: goto parse_int;
456:
457: case oCompressionLevel:
458: intptr = &options->compression_level;
459: goto parse_int;
460:
1.105 markus 461: case oRekeyLimit:
462: intptr = &options->rekey_limit;
463: arg = strdelim(&s);
464: if (!arg || *arg == '\0')
465: fatal("%.200s line %d: Missing argument.", filename, linenum);
466: if (arg[0] < '0' || arg[0] > '9')
467: fatal("%.200s line %d: Bad number.", filename, linenum);
468: value = strtol(arg, &endofnumber, 10);
469: if (arg == endofnumber)
470: fatal("%.200s line %d: Bad number.", filename, linenum);
471: switch (toupper(*endofnumber)) {
472: case 'K':
473: value *= 1<<10;
474: break;
475: case 'M':
476: value *= 1<<20;
477: break;
478: case 'G':
479: value *= 1<<30;
480: break;
481: }
482: if (*activep && *intptr == -1)
483: *intptr = value;
484: break;
485:
1.17 markus 486: case oIdentityFile:
1.42 provos 487: arg = strdelim(&s);
1.40 ho 488: if (!arg || *arg == '\0')
1.17 markus 489: fatal("%.200s line %d: Missing argument.", filename, linenum);
490: if (*activep) {
1.50 markus 491: intptr = &options->num_identity_files;
1.27 markus 492: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 493: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 494: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.50 markus 495: charptr = &options->identity_files[*intptr];
1.38 provos 496: *charptr = xstrdup(arg);
1.27 markus 497: *intptr = *intptr + 1;
1.17 markus 498: }
499: break;
500:
1.34 markus 501: case oXAuthLocation:
502: charptr=&options->xauth_location;
503: goto parse_string;
504:
1.17 markus 505: case oUser:
506: charptr = &options->user;
507: parse_string:
1.42 provos 508: arg = strdelim(&s);
1.40 ho 509: if (!arg || *arg == '\0')
1.17 markus 510: fatal("%.200s line %d: Missing argument.", filename, linenum);
511: if (*activep && *charptr == NULL)
1.38 provos 512: *charptr = xstrdup(arg);
1.17 markus 513: break;
514:
515: case oGlobalKnownHostsFile:
516: charptr = &options->system_hostfile;
517: goto parse_string;
518:
519: case oUserKnownHostsFile:
520: charptr = &options->user_hostfile;
521: goto parse_string;
522:
1.27 markus 523: case oGlobalKnownHostsFile2:
524: charptr = &options->system_hostfile2;
525: goto parse_string;
526:
527: case oUserKnownHostsFile2:
528: charptr = &options->user_hostfile2;
529: goto parse_string;
530:
1.17 markus 531: case oHostName:
532: charptr = &options->hostname;
533: goto parse_string;
534:
1.52 markus 535: case oHostKeyAlias:
536: charptr = &options->host_key_alias;
537: goto parse_string;
538:
1.67 markus 539: case oPreferredAuthentications:
540: charptr = &options->preferred_authentications;
541: goto parse_string;
542:
1.77 markus 543: case oBindAddress:
544: charptr = &options->bind_address;
545: goto parse_string;
546:
1.85 jakob 547: case oSmartcardDevice:
1.86 markus 548: charptr = &options->smartcard_device;
549: goto parse_string;
1.85 jakob 550:
1.17 markus 551: case oProxyCommand:
1.113 markus 552: if (s == NULL)
553: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.17 markus 554: charptr = &options->proxy_command;
1.102 markus 555: len = strspn(s, WHITESPACE "=");
1.17 markus 556: if (*activep && *charptr == NULL)
1.102 markus 557: *charptr = xstrdup(s + len);
1.17 markus 558: return 0;
559:
560: case oPort:
561: intptr = &options->port;
562: parse_int:
1.42 provos 563: arg = strdelim(&s);
1.40 ho 564: if (!arg || *arg == '\0')
1.17 markus 565: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 566: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 567: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 568:
569: /* Octal, decimal, or hex format? */
1.38 provos 570: value = strtol(arg, &endofnumber, 0);
571: if (arg == endofnumber)
1.21 markus 572: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 573: if (*activep && *intptr == -1)
574: *intptr = value;
575: break;
576:
577: case oConnectionAttempts:
578: intptr = &options->connection_attempts;
579: goto parse_int;
580:
581: case oCipher:
582: intptr = &options->cipher;
1.42 provos 583: arg = strdelim(&s);
1.40 ho 584: if (!arg || *arg == '\0')
1.32 markus 585: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 586: value = cipher_number(arg);
1.17 markus 587: if (value == -1)
588: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 589: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 590: if (*activep && *intptr == -1)
591: *intptr = value;
592: break;
593:
1.25 markus 594: case oCiphers:
1.42 provos 595: arg = strdelim(&s);
1.40 ho 596: if (!arg || *arg == '\0')
1.32 markus 597: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 598: if (!ciphers_valid(arg))
1.31 markus 599: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 600: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 601: if (*activep && options->ciphers == NULL)
1.38 provos 602: options->ciphers = xstrdup(arg);
1.25 markus 603: break;
604:
1.62 markus 605: case oMacs:
606: arg = strdelim(&s);
607: if (!arg || *arg == '\0')
608: fatal("%.200s line %d: Missing argument.", filename, linenum);
609: if (!mac_valid(arg))
610: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 611: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 612: if (*activep && options->macs == NULL)
613: options->macs = xstrdup(arg);
614: break;
615:
1.76 markus 616: case oHostKeyAlgorithms:
617: arg = strdelim(&s);
618: if (!arg || *arg == '\0')
619: fatal("%.200s line %d: Missing argument.", filename, linenum);
620: if (!key_names_valid2(arg))
621: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 622: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 623: if (*activep && options->hostkeyalgorithms == NULL)
624: options->hostkeyalgorithms = xstrdup(arg);
625: break;
626:
1.25 markus 627: case oProtocol:
628: intptr = &options->protocol;
1.42 provos 629: arg = strdelim(&s);
1.40 ho 630: if (!arg || *arg == '\0')
1.32 markus 631: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 632: value = proto_spec(arg);
1.25 markus 633: if (value == SSH_PROTO_UNKNOWN)
634: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 635: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 636: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
637: *intptr = value;
638: break;
639:
1.17 markus 640: case oLogLevel:
641: intptr = (int *) &options->log_level;
1.42 provos 642: arg = strdelim(&s);
1.38 provos 643: value = log_level_number(arg);
1.95 markus 644: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 645: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 646: filename, linenum, arg ? arg : "<NONE>");
1.95 markus 647: if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
1.17 markus 648: *intptr = (LogLevel) value;
649: break;
650:
1.88 stevesk 651: case oLocalForward:
1.17 markus 652: case oRemoteForward:
1.42 provos 653: arg = strdelim(&s);
1.135 djm 654: if (arg == NULL || *arg == '\0')
1.88 stevesk 655: fatal("%.200s line %d: Missing port argument.",
656: filename, linenum);
1.135 djm 657: arg2 = strdelim(&s);
658: if (arg2 == NULL || *arg2 == '\0')
659: fatal("%.200s line %d: Missing target argument.",
1.88 stevesk 660: filename, linenum);
1.135 djm 661:
662: /* construct a string for parse_forward */
663: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
664:
665: if (parse_forward(&fwd, fwdarg) == 0)
1.88 stevesk 666: fatal("%.200s line %d: Bad forwarding specification.",
667: filename, linenum);
1.135 djm 668:
1.88 stevesk 669: if (*activep) {
670: if (opcode == oLocalForward)
1.135 djm 671: add_local_forward(options, &fwd);
1.88 stevesk 672: else if (opcode == oRemoteForward)
1.135 djm 673: add_remote_forward(options, &fwd);
1.88 stevesk 674: }
1.17 markus 675: break;
1.71 markus 676:
677: case oDynamicForward:
678: arg = strdelim(&s);
679: if (!arg || *arg == '\0')
680: fatal("%.200s line %d: Missing port argument.",
681: filename, linenum);
1.135 djm 682: memset(&fwd, '\0', sizeof(fwd));
683: fwd.connect_host = "socks";
684: fwd.listen_host = hpdelim(&arg);
685: if (fwd.listen_host == NULL ||
686: strlen(fwd.listen_host) >= NI_MAXHOST)
687: fatal("%.200s line %d: Bad forwarding specification.",
688: filename, linenum);
689: if (arg) {
690: fwd.listen_port = a2port(arg);
691: fwd.listen_host = cleanhostname(fwd.listen_host);
692: } else {
693: fwd.listen_port = a2port(fwd.listen_host);
694: fwd.listen_host = "";
695: }
696: if (fwd.listen_port == 0)
1.71 markus 697: fatal("%.200s line %d: Badly formatted port number.",
698: filename, linenum);
1.87 markus 699: if (*activep)
1.135 djm 700: add_local_forward(options, &fwd);
1.72 markus 701: break;
1.17 markus 702:
1.90 stevesk 703: case oClearAllForwardings:
704: intptr = &options->clear_forwardings;
705: goto parse_flag;
706:
1.17 markus 707: case oHost:
708: *activep = 0;
1.42 provos 709: while ((arg = strdelim(&s)) != NULL && *arg != '\0')
1.38 provos 710: if (match_pattern(host, arg)) {
711: debug("Applying options for %.100s", arg);
1.17 markus 712: *activep = 1;
713: break;
714: }
1.42 provos 715: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 716: return 0;
717:
718: case oEscapeChar:
719: intptr = &options->escape_char;
1.42 provos 720: arg = strdelim(&s);
1.40 ho 721: if (!arg || *arg == '\0')
1.17 markus 722: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 723: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 724: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
725: value = (u_char) arg[1] & 31;
1.38 provos 726: else if (strlen(arg) == 1)
1.51 markus 727: value = (u_char) arg[0];
1.38 provos 728: else if (strcmp(arg, "none") == 0)
1.79 stevesk 729: value = SSH_ESCAPECHAR_NONE;
1.17 markus 730: else {
731: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 732: filename, linenum);
1.17 markus 733: /* NOTREACHED */
734: value = 0; /* Avoid compiler warning. */
735: }
736: if (*activep && *intptr == -1)
737: *intptr = value;
1.112 djm 738: break;
739:
740: case oAddressFamily:
741: arg = strdelim(&s);
1.114 djm 742: intptr = &options->address_family;
1.112 djm 743: if (strcasecmp(arg, "inet") == 0)
1.114 djm 744: value = AF_INET;
1.112 djm 745: else if (strcasecmp(arg, "inet6") == 0)
1.114 djm 746: value = AF_INET6;
1.112 djm 747: else if (strcasecmp(arg, "any") == 0)
1.114 djm 748: value = AF_UNSPEC;
1.112 djm 749: else
750: fatal("Unsupported AddressFamily \"%s\"", arg);
1.114 djm 751: if (*activep && *intptr == -1)
752: *intptr = value;
1.17 markus 753: break;
754:
1.101 markus 755: case oEnableSSHKeysign:
756: intptr = &options->enable_ssh_keysign;
757: goto parse_flag;
758:
1.128 markus 759: case oIdentitiesOnly:
760: intptr = &options->identities_only;
761: goto parse_flag;
762:
1.127 markus 763: case oServerAliveInterval:
764: intptr = &options->server_alive_interval;
765: goto parse_time;
766:
767: case oServerAliveCountMax:
768: intptr = &options->server_alive_count_max;
769: goto parse_int;
770:
1.130 djm 771: case oSendEnv:
772: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
773: if (strchr(arg, '=') != NULL)
774: fatal("%s line %d: Invalid environment name.",
775: filename, linenum);
1.137 ! djm 776: if (!*activep)
! 777: continue;
1.130 djm 778: if (options->num_send_env >= MAX_SEND_ENV)
779: fatal("%s line %d: too many send env.",
780: filename, linenum);
781: options->send_env[options->num_send_env++] =
782: xstrdup(arg);
783: }
784: break;
785:
1.132 djm 786: case oControlPath:
787: charptr = &options->control_path;
788: goto parse_string;
789:
790: case oControlMaster:
791: intptr = &options->control_master;
1.133 djm 792: goto parse_yesnoask;
1.132 djm 793:
1.136 djm 794: case oHashKnownHosts:
795: intptr = &options->hash_known_hosts;
796: goto parse_flag;
797:
1.96 markus 798: case oDeprecated:
1.98 markus 799: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 800: filename, linenum, keyword);
1.98 markus 801: return 0;
1.96 markus 802:
1.110 jakob 803: case oUnsupported:
804: error("%s line %d: Unsupported option \"%s\"",
805: filename, linenum, keyword);
806: return 0;
807:
1.17 markus 808: default:
809: fatal("process_config_line: Unimplemented opcode %d", opcode);
810: }
811:
812: /* Check that there is no garbage at end of line. */
1.57 djm 813: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 814: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.93 deraadt 815: filename, linenum, arg);
1.39 ho 816: }
1.17 markus 817: return 0;
1.1 deraadt 818: }
819:
820:
1.19 markus 821: /*
822: * Reads the config file and modifies the options accordingly. Options
823: * should already be initialized before this call. This never returns if
1.89 stevesk 824: * there is an error. If the file does not exist, this returns 0.
1.19 markus 825: */
1.1 deraadt 826:
1.89 stevesk 827: int
1.134 deraadt 828: read_config_file(const char *filename, const char *host, Options *options,
1.129 djm 829: int checkperm)
1.1 deraadt 830: {
1.17 markus 831: FILE *f;
832: char line[1024];
833: int active, linenum;
834: int bad_options = 0;
835:
836: /* Open the file. */
1.129 djm 837: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 838: return 0;
1.129 djm 839:
840: if (checkperm) {
841: struct stat sb;
1.134 deraadt 842:
1.131 dtucker 843: if (fstat(fileno(f), &sb) == -1)
1.129 djm 844: fatal("fstat %s: %s", filename, strerror(errno));
845: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 846: (sb.st_mode & 022) != 0))
1.129 djm 847: fatal("Bad owner or permissions on %s", filename);
848: }
1.17 markus 849:
850: debug("Reading configuration data %.200s", filename);
851:
1.19 markus 852: /*
853: * Mark that we are now processing the options. This flag is turned
854: * on/off by Host specifications.
855: */
1.17 markus 856: active = 1;
857: linenum = 0;
858: while (fgets(line, sizeof(line), f)) {
859: /* Update line number counter. */
860: linenum++;
861: if (process_config_line(options, host, line, filename, linenum, &active) != 0)
862: bad_options++;
863: }
864: fclose(f);
865: if (bad_options > 0)
1.64 millert 866: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 867: filename, bad_options);
1.89 stevesk 868: return 1;
1.1 deraadt 869: }
870:
1.19 markus 871: /*
872: * Initializes options to special values that indicate that they have not yet
873: * been set. Read_config_file will only set options with this value. Options
874: * are processed in the following order: command line, user config file,
875: * system config file. Last, fill_default_options is called.
876: */
1.1 deraadt 877:
1.26 markus 878: void
1.17 markus 879: initialize_options(Options * options)
1.1 deraadt 880: {
1.17 markus 881: memset(options, 'X', sizeof(*options));
882: options->forward_agent = -1;
883: options->forward_x11 = -1;
1.123 markus 884: options->forward_x11_trusted = -1;
1.34 markus 885: options->xauth_location = NULL;
1.17 markus 886: options->gateway_ports = -1;
887: options->use_privileged_port = -1;
888: options->rsa_authentication = -1;
1.50 markus 889: options->pubkey_authentication = -1;
1.78 markus 890: options->challenge_response_authentication = -1;
1.118 markus 891: options->gss_authentication = -1;
892: options->gss_deleg_creds = -1;
1.17 markus 893: options->password_authentication = -1;
1.48 markus 894: options->kbd_interactive_authentication = -1;
895: options->kbd_interactive_devices = NULL;
1.17 markus 896: options->rhosts_rsa_authentication = -1;
1.72 markus 897: options->hostbased_authentication = -1;
1.17 markus 898: options->batch_mode = -1;
899: options->check_host_ip = -1;
900: options->strict_host_key_checking = -1;
901: options->compression = -1;
1.126 markus 902: options->tcp_keep_alive = -1;
1.17 markus 903: options->compression_level = -1;
904: options->port = -1;
1.114 djm 905: options->address_family = -1;
1.17 markus 906: options->connection_attempts = -1;
1.111 djm 907: options->connection_timeout = -1;
1.17 markus 908: options->number_of_password_prompts = -1;
909: options->cipher = -1;
1.25 markus 910: options->ciphers = NULL;
1.62 markus 911: options->macs = NULL;
1.76 markus 912: options->hostkeyalgorithms = NULL;
1.25 markus 913: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 914: options->num_identity_files = 0;
915: options->hostname = NULL;
1.52 markus 916: options->host_key_alias = NULL;
1.17 markus 917: options->proxy_command = NULL;
918: options->user = NULL;
919: options->escape_char = -1;
920: options->system_hostfile = NULL;
921: options->user_hostfile = NULL;
1.27 markus 922: options->system_hostfile2 = NULL;
923: options->user_hostfile2 = NULL;
1.17 markus 924: options->num_local_forwards = 0;
925: options->num_remote_forwards = 0;
1.90 stevesk 926: options->clear_forwardings = -1;
1.95 markus 927: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 928: options->preferred_authentications = NULL;
1.77 markus 929: options->bind_address = NULL;
1.86 markus 930: options->smartcard_device = NULL;
1.101 markus 931: options->enable_ssh_keysign = - 1;
1.91 markus 932: options->no_host_authentication_for_localhost = - 1;
1.128 markus 933: options->identities_only = - 1;
1.105 markus 934: options->rekey_limit = - 1;
1.107 jakob 935: options->verify_host_key_dns = -1;
1.127 markus 936: options->server_alive_interval = -1;
937: options->server_alive_count_max = -1;
1.130 djm 938: options->num_send_env = 0;
1.132 djm 939: options->control_path = NULL;
940: options->control_master = -1;
1.136 djm 941: options->hash_known_hosts = -1;
1.1 deraadt 942: }
943:
1.19 markus 944: /*
945: * Called after processing other sources of option data, this fills those
946: * options for which no value has been specified with their default values.
947: */
1.1 deraadt 948:
1.26 markus 949: void
1.17 markus 950: fill_default_options(Options * options)
1.1 deraadt 951: {
1.61 deraadt 952: int len;
953:
1.17 markus 954: if (options->forward_agent == -1)
1.33 markus 955: options->forward_agent = 0;
1.17 markus 956: if (options->forward_x11 == -1)
1.23 markus 957: options->forward_x11 = 0;
1.123 markus 958: if (options->forward_x11_trusted == -1)
959: options->forward_x11_trusted = 0;
1.34 markus 960: if (options->xauth_location == NULL)
1.80 markus 961: options->xauth_location = _PATH_XAUTH;
1.17 markus 962: if (options->gateway_ports == -1)
963: options->gateway_ports = 0;
964: if (options->use_privileged_port == -1)
1.65 markus 965: options->use_privileged_port = 0;
1.17 markus 966: if (options->rsa_authentication == -1)
967: options->rsa_authentication = 1;
1.50 markus 968: if (options->pubkey_authentication == -1)
969: options->pubkey_authentication = 1;
1.78 markus 970: if (options->challenge_response_authentication == -1)
1.83 markus 971: options->challenge_response_authentication = 1;
1.118 markus 972: if (options->gss_authentication == -1)
1.122 markus 973: options->gss_authentication = 0;
1.118 markus 974: if (options->gss_deleg_creds == -1)
975: options->gss_deleg_creds = 0;
1.17 markus 976: if (options->password_authentication == -1)
977: options->password_authentication = 1;
1.48 markus 978: if (options->kbd_interactive_authentication == -1)
1.59 markus 979: options->kbd_interactive_authentication = 1;
1.17 markus 980: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 981: options->rhosts_rsa_authentication = 0;
1.72 markus 982: if (options->hostbased_authentication == -1)
983: options->hostbased_authentication = 0;
1.17 markus 984: if (options->batch_mode == -1)
985: options->batch_mode = 0;
986: if (options->check_host_ip == -1)
987: options->check_host_ip = 1;
988: if (options->strict_host_key_checking == -1)
989: options->strict_host_key_checking = 2; /* 2 is default */
990: if (options->compression == -1)
991: options->compression = 0;
1.126 markus 992: if (options->tcp_keep_alive == -1)
993: options->tcp_keep_alive = 1;
1.17 markus 994: if (options->compression_level == -1)
995: options->compression_level = 6;
996: if (options->port == -1)
997: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 998: if (options->address_family == -1)
999: options->address_family = AF_UNSPEC;
1.17 markus 1000: if (options->connection_attempts == -1)
1.84 markus 1001: options->connection_attempts = 1;
1.17 markus 1002: if (options->number_of_password_prompts == -1)
1003: options->number_of_password_prompts = 3;
1004: /* Selected in ssh_login(). */
1005: if (options->cipher == -1)
1006: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1007: /* options->ciphers, default set in myproposals.h */
1.62 markus 1008: /* options->macs, default set in myproposals.h */
1.76 markus 1009: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1010: if (options->protocol == SSH_PROTO_UNKNOWN)
1.69 markus 1011: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
1.17 markus 1012: if (options->num_identity_files == 0) {
1.50 markus 1013: if (options->protocol & SSH_PROTO_1) {
1.61 deraadt 1014: len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
1.50 markus 1015: options->identity_files[options->num_identity_files] =
1.61 deraadt 1016: xmalloc(len);
1017: snprintf(options->identity_files[options->num_identity_files++],
1018: len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
1.50 markus 1019: }
1020: if (options->protocol & SSH_PROTO_2) {
1.63 deraadt 1021: len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
1022: options->identity_files[options->num_identity_files] =
1023: xmalloc(len);
1024: snprintf(options->identity_files[options->num_identity_files++],
1025: len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
1026:
1.61 deraadt 1027: len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
1.50 markus 1028: options->identity_files[options->num_identity_files] =
1.61 deraadt 1029: xmalloc(len);
1030: snprintf(options->identity_files[options->num_identity_files++],
1031: len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
1.50 markus 1032: }
1.27 markus 1033: }
1.17 markus 1034: if (options->escape_char == -1)
1035: options->escape_char = '~';
1036: if (options->system_hostfile == NULL)
1.55 markus 1037: options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
1.17 markus 1038: if (options->user_hostfile == NULL)
1.55 markus 1039: options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
1.27 markus 1040: if (options->system_hostfile2 == NULL)
1.55 markus 1041: options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
1.27 markus 1042: if (options->user_hostfile2 == NULL)
1.55 markus 1043: options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
1.95 markus 1044: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1045: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1046: if (options->clear_forwardings == 1)
1047: clear_forwardings(options);
1.91 markus 1048: if (options->no_host_authentication_for_localhost == - 1)
1049: options->no_host_authentication_for_localhost = 0;
1.128 markus 1050: if (options->identities_only == -1)
1051: options->identities_only = 0;
1.101 markus 1052: if (options->enable_ssh_keysign == -1)
1053: options->enable_ssh_keysign = 0;
1.105 markus 1054: if (options->rekey_limit == -1)
1055: options->rekey_limit = 0;
1.107 jakob 1056: if (options->verify_host_key_dns == -1)
1057: options->verify_host_key_dns = 0;
1.127 markus 1058: if (options->server_alive_interval == -1)
1059: options->server_alive_interval = 0;
1060: if (options->server_alive_count_max == -1)
1061: options->server_alive_count_max = 3;
1.132 djm 1062: if (options->control_master == -1)
1063: options->control_master = 0;
1.136 djm 1064: if (options->hash_known_hosts == -1)
1065: options->hash_known_hosts = 0;
1.17 markus 1066: /* options->proxy_command should not be set by default */
1067: /* options->user will be set in the main program if appropriate */
1068: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1069: /* options->host_key_alias should not be set by default */
1.67 markus 1070: /* options->preferred_authentications will be set in ssh */
1.135 djm 1071: }
1072:
1073: /*
1074: * parse_forward
1075: * parses a string containing a port forwarding specification of the form:
1076: * [listenhost:]listenport:connecthost:connectport
1077: * returns number of arguments parsed or zero on error
1078: */
1079: int
1080: parse_forward(Forward *fwd, const char *fwdspec)
1081: {
1082: int i;
1083: char *p, *cp, *fwdarg[4];
1084:
1085: memset(fwd, '\0', sizeof(*fwd));
1086:
1087: cp = p = xstrdup(fwdspec);
1088:
1089: /* skip leading spaces */
1090: while (*cp && isspace(*cp))
1091: cp++;
1092:
1093: for (i = 0; i < 4; ++i)
1094: if ((fwdarg[i] = hpdelim(&cp)) == NULL)
1095: break;
1096:
1097: /* Check for trailing garbage in 4-arg case*/
1098: if (cp != NULL)
1099: i = 0; /* failure */
1100:
1101: switch (i) {
1102: case 3:
1103: fwd->listen_host = NULL;
1104: fwd->listen_port = a2port(fwdarg[0]);
1105: fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
1106: fwd->connect_port = a2port(fwdarg[2]);
1107: break;
1108:
1109: case 4:
1110: fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
1111: fwd->listen_port = a2port(fwdarg[1]);
1112: fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
1113: fwd->connect_port = a2port(fwdarg[3]);
1114: break;
1115: default:
1116: i = 0; /* failure */
1117: }
1118:
1119: xfree(p);
1120:
1121: if (fwd->listen_port == 0 && fwd->connect_port == 0)
1122: goto fail_free;
1123:
1124: if (fwd->connect_host != NULL &&
1125: strlen(fwd->connect_host) >= NI_MAXHOST)
1126: goto fail_free;
1127:
1128: return (i);
1129:
1130: fail_free:
1131: if (fwd->connect_host != NULL)
1132: xfree(fwd->connect_host);
1133: if (fwd->listen_host != NULL)
1134: xfree(fwd->listen_host);
1135: return (0);
1.1 deraadt 1136: }
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